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A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [ 1 ] POST processes may set the initial state of the device from firmware and detect if any hardware components are non-functional.
At a minimum, if the CPU, BIOS, and the I/O interface upon which the POST card relies on are all working, a POST card can be used to monitor the system's Power-On Self Test (POST), or to diagnose problems with it.
Key Code Qualifier is an error-code returned by a SCSI device. ... self-test in progress 2: 31: 00: ... power-on or self-test failure x: 4C: 00:
If the system has just been powered up or the reset button was pressed ("cold boot"), the full power-on self-test (POST) is run. If Ctrl+Alt+Delete was pressed ("warm boot"), a special flag value stored in nonvolatile BIOS memory ("CMOS") tested by the BIOS allows bypass of the lengthy POST and memory detection.
This program runs a power-on self-test (POST) to check and initialize required devices such as main memory , the PCI bus and the PCI devices (including running embedded Option ROMs). One of the most involved steps is setting up DRAM over SPD, further complicated by the fact that at this point memory is very limited.
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Generally during the power-on self-test, BIOS access can be gained by hitting either a function key or the Del key. In the BIOS keys can have different purposes depending on the BIOS. However, F10 is the de facto standard for save and exit which saves all changes and restarts the system.
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